Small momentum evolution of the extended Drell-Hearn-Gerasimov sum rule

Véronique Bernard, Norbert Kaiser, Ulf G. Meissner

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We investigate the momentum dependence of the extended Drell-Hearn-Gerasimov (DHG) sum rule. An economical formalism is developed which allows one to express the extended DHG sum rule in terms of a single virtual Compton amplitude in the forward direction. Rigorous results for the small momentum evolution are derived from chiral perturbation theory within the one-loop approximation. Furthermore, we evaluate some higher-order contributions arising from Δ(1232) intermediate states and relativistic corrections. We also discuss the limitations of our approach.

Original languageEnglish
Pages (from-to)3062-3069
Number of pages8
JournalPhysical Review D
Volume48
Issue number7
DOIs
StatePublished - 1993

Fingerprint

Dive into the research topics of 'Small momentum evolution of the extended Drell-Hearn-Gerasimov sum rule'. Together they form a unique fingerprint.

Cite this